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Business Stats ch 4

Basic Statistics for Business and Economics ch 4

QuestionAnswer
Dot Plot A dot is displayed for each observation along a horizontal number line indicating the possible values of the data.
Quartiles Dividing a set of observations into four equal parts.
Deciles Dividing a set of observations into ten equal parts.
Percentiles Dividing a set of observations into 100 equal parts.
Box Plot A graphical display, based on quartiles, that help us picture a set of data.
Interquartile Range (IQR) The distance between the first and the third quartile. Q3 - Q1
Outlier A value that is inconsistent with the rest of the data. A value that is more than 1.5 times the interquartile range smaller than Q1 or larger than Q3.
Symmetric A set of observations where the mean and median are equal and the data values are a mirror image of those above.
Skewed to the Right or Positively Skewed A set of values where there is a single peak and the values extend much further to the right of the peak than to the left of the peak.
Skewed to the Left or Negatively Skewed A set of values where there is a single peak and the values extend much further to the left of the peak than to the right of the peak.
Bimodal Distribution A set of values that have two or more peaks.
Scatter Diagram A graphical technique used to show the relationship between variables. Two variables are needed. Scale one variable along the horizontal axis (x-axis) of a graph and one variable along the vertical axis (y-axis).
Contingency Table A table used to classify observations according to two identifiable characteristics.
Created by: dengler
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